OCR A 5.2.3 Redox and Electrode Potentials REVISION

[@lukebrown2498]

These videos are so so helpful, I know you get appreciative comments all the time but it can not be stated enough how much of an impact you have on students and their grades, if I do well in my exams then you get half the credit (:

[@AlleryChemistry]

Thanks for your kind words. I'm pleased the videos are helping and I hope you get a decent grade on the back of it. 👍

[@emmanuel4257]

I always feel more confident after watching your videos. The NO PROBLEM acronym was so helpful man, thank you!

[@megr9837]

thank you so much for this you've really saved me! I have a high stakes exam in this tomorrow and since we were taught this over lockdown through home learning, I haven't understood a thing! So grateful I now am on track, thank you!

[@idontknow1630]

how did it end up going for you in the end?

[@moayadgriwi3450]

You are actually more than amazing. After watching your videos they make me literally put the topic in the safe side.

[@OmoKowe]

Thank you for all the hard work

[@AlleryChemistry]

No worries!

[@ahmdrezz4832]

You've taught me more than my teacher has in a year, thanks a lot!

[@oliwiafranczak7610]

Your videos are what gets me through chemistry, thank you for all your hard work.

[@bellamaclusky]

this is amazing!!! your channel is the perfect revision resource :)

[@AlleryChemistry]

Glad you think so!

[@lewtube4372]

Allery Chemistry the GOAT

[@yenm4650]

Thank you so much for all the thought and effort you put in; this was incredibly helpful!

[@louisguy5726]

very helpful video, would suggest maybe putting some exam questions up so people can pause and try them throughout

[@sehergurbuz6524]

This video is absolutely amazing. Thank you so much helped me understand the whole thing in an hour

[@joshuastarky4785]

Thank you for making this free.

[@ba5849]

Your video is absolutely amazing! I can't thank you enough for all your hard work! I do have a question, so you mentioned that electrons will always flow from the most reactive metal to the least reactive metal. So I'm a little confused whether we look at them in terms of a reactive the metals are or in terms of e values?

[@FaizanA-mh4pd]

At 57:20, doesn't increasing the concentration of Fe cause the electrode potential to become more negative?

[@alexswarbrick984]

Yep, you're right

[@shaswathansanjeevvijay5500]

I was thinking the same thing and went into the comments to find someone saying the same thing.

[@neithonosmani9783]

Why do you think it becomes more negative?

[@potatomaster1836]

@@neithonosmani9783 I think it’s because increase Fe(s) conc shifts equilibrium to LHS so there’s more e-

[@cen1279]

Yeah, I thought this too

[@bLue-xx1uy]

At 57:20, if you increase the concentration of Fe, the equilibrium would shift left therefore increasing the electrons in the system, wouldn't that make the electrode potential of Fe2+/Fe more negative and hence overall cell potential would be higher?

[@bLue-xx1uy]

Also increasing the concentration of Fe solid doesn't sound quite right, I think when we state that altering the concentration affects the E0 value: it is only about altering the concentration of the aqueous ion solution or the pressure if the system involves gases?

[@Askodaicjosjcioejf]

idk i thought that too

[@milanacs1916]

Thanks for practicaly teaching me this topic sir

[@hiamnaima368]

These videos are very helpful thank you very much. I just have a question. what could they ask in an exam in the 1-3 marks questions on these topics. e.g. why is an excess of KI added? for redox and electrode

[@umeraziz1533]

WHy doesn't the colour of fe2+ show in the solution as i thought fe2+ is a green solution so technically shouldn't the green colour mix with the purple colour from Mn04-

[@masoud1082]

do we need to know about cell notations sir it isnt directly stated in spec. Thanks for the videos sir

[@_hxsna_5349]

for the redox titrations do we have to know them off by heart ? - or what do we have to know about them ?

[@duderandom7023]

Can you please make a playlists of year 2 edexcel presentations while you make in it after you finish with ocr,thanks 😊

[@AlleryChemistry]

Yes. Please vote via twitter. twitter.com/allerytutors/status/1258408810714140672?s=20

[@Allinone-nm2jh]

thank you very much sir .

[@AlleryChemistry]

You're welcome 😊

[@habdfrs8115]

thank you so much for these videos

[@AlleryChemistry]

Glad you like them!

[@duderandom7023]

Love you work bro👌

[@AlleryChemistry]

Thank you so much 😀

[@Letik3x]

Thanks for saving me during exam season -

[@AshrafuI]

Are the steps for the hydrogen fuel cell part of the spec?

[@hassanashraf6909]

When will you be doing these for A2 chemistry AQA??

[@AlleryChemistry]

Yes. Please vote via twitter. Thanks. twitter.com/allerytutors/status/1258408810714140672?s=20

[@danielhartland3737]

i'm so excited

[@khan99ish]

sir when do you apply the anticlockwise rule to obtain a full redox equation for two half equations?

[@AlleryChemistry]

When you want to establish what the overall feasible reaction is. 👍

[@MohammedHussain-nw1sn]

What about in excess alkali?

[@ellaharwanko3497]

Do you always flip the more negative equation?

[@louisexxxxasasasa2567]

At 25:08 is 5I- the oxidising agent or I03-

[@hmm...jesusisking]

IO3-

[@rahh8222]

LEGEND

[@ellasidney2]

are we supposed to know the colour change for our exam at 13:26?

[@yabombo8145]

yeah you have to learn em for transition metals anyways g

[@joannadaniel9396]

thank you

[@imanawan5630]

It’s fine dw about it

[@aanyasetia6572]

You're welcome

[@mahamaddahir5193]

hi doe s anyone know why the electrons from from the anode to the cathode rather than the other way round?

[@layanfiras7539]

At the anode the compounds are oxidised so they lose electrons and at the cathode they are reduced so they gain electrons. So the electrons must be supplied by the ones losing electrons and so they move from the negative anode to the positive cathode

[@ZakariaMahamud-x2w]

hello mahamad dahir

[@thayaparanthambi8254]

nice

[@albertothornton5863]

40:47